/**
 * 
 */
$(function(){
	var websocket = null;
    //判断当前浏览器是否支持WebSocket
	var host  =window.location.hostname;
	var port = window.location.port;
    if('WebSocket' in window){
//        websocket = new WebSocket("ws://localhost:8092/websocket");
        websocket = new WebSocket('ws://'+host+":"+port +"/websocket");
    }
    else{
        alert('Not support websocket')
    }

    //连接发生错误的回调方法
    websocket.onerror = function(){
        setMessageInnerHTML("error");
    };

    //连接成功建立的回调方法
    websocket.onopen = function(event){
        setMessageInnerHTML("open");
    }

    //接收到消息的回调方法
    websocket.onmessage = function(event){
        setMessageInnerHTML(event.data);
    }

    //连接关闭的回调方法
    websocket.onclose = function(){
        setMessageInnerHTML("close");
    }

    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
    window.onbeforeunload = function(){
        websocket.close();
    }

    //将消息显示在网页上
    function setMessageInnerHTML(innerHTML){
        document.getElementById('message').innerHTML += innerHTML + '<br/>';
    }

    //关闭连接
     $('#bclose').click(function(){
        websocket.close();
     });
    

    //发送消息
     $('#bsend').click(function(){
     	var message = document.getElementById('text').value;
        websocket.send(message);
     });
});
